The easiest PPC method to get started with is Google AdSense. However, in order to make any kind of decent money with display ads, you’ll need quite a bit of traffic. And by the time you get that much traffic, you’ll make more money going with an ad management company like Mediavine (minimum of 25,000 monthly impressions) or AdThrive (minimum of 100,000 monthly pageviews).
Jon Morrow is the gold standard in this arena, and this post encapsulates that. He consulted with me at the launch of my blog, and these 20 principles feel like evolutions of that great advice. My numbers are nowhere near his (frankly, my subscriber list seems fixed lately), but my experience validates the core of what’s here: it’s all about consulting, leading to products (in my case, a bit of the other way around, via a book that arose from my website/blog). If you can afford Jon (I can’t), go for it… provided you truly are an “expert” in a given field, one that other people will pay to listen to. If you can’t, or aren’t (at least yet), just read everything he’s written, here and elsewhere.
Include keywords in important places. Include them in your blog post title, the large "headers" introducing a new section, the first few sentences of your post, and in links. Change your settings so each blog post's URL includes the title of the post, not the date it was posted. Try to make these as descriptive as possible to raise your ranking in search results and attract the right audience.
Be aware that many blog hosting services only allow their proprietary contextual ad service, and may shut down your blog if you use one not made by the host company. If you are hosting your own blog, you should research contextual ad services and choose one that shows appropriate ads. Some allow pornography or other ads that may not be suitable for your blog.
Once you setup your account on AdSense you will be given a code to add to your blog. This code will automatically display advertisements on your blog from companies who are part of Google’s advertising network. You may see ads from small companies related to your topic, or you may see ads from large companies that are completely unrelated to your topic.